A Tool that Generates Random Passwords

You can build a tool that generates random password for users to have a strong password.

You can monetize it using ads.

User can select the length, and what characters to include. For example users can only generate letters and numbers with no spaces. Or just uppercase and lowercase letters.

You can also add what is the last character or the first.

This website can be built using HTML, CSS and JS.

No need for a backend language like PHP or MySQL.